<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>State</title>
  <!--  引入React核心库-->
  <script src="https://unpkg.com/react@18/umd/react.development.js"></script>
  <!--  引入react-dom,用于支持React操作Dom-->
  <script src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>
  <!-- 引入babel，用于将jsx转为js-->
  <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
</head>

<body>
  <div id="root"></div>
  <script type="text/babel">
    // 1.创建组件
    class Weather extends React.Component {
      state = {
        isHot: true,
        wind: '微风'
      }
      render() {
        const { isHot, wind } = this.state
        return <h1 onClick={this.changeWeather}>今天天气很{isHot ? '炎热' : '凉爽'},{wind}</h1>
      }
      // 自定义方法————要用赋值语句的形式+箭头函数
      changeWeather = () => {
        const isHot = this.state.isHot
        this.setState({ isHot: !isHot })
      }
    }
    // 2.渲染组件到页面
    const container = document.getElementById('root')
    const root = ReactDOM.createRoot(container)
    root.render(<Weather />)
  </script>
</body>

</html>